style(admin): unify dialog layouts and dense readonly presentation

src/modules/customers/customerDialogTitle.ts

@@ -0,0 +1,9 @@
+interface CustomerDialogIdentity {
+  tenantCode?: string | null
+  tenantName?: string | null
+}
+
+export function customerDialogTitle(action: string, customer?: CustomerDialogIdentity | null): string {
+  const identity = customer?.tenantCode?.trim() || customer?.tenantName?.trim()
+  return identity ? `${action} · ${identity}` : action
+}